<template>
  <div>
    <div class="user-info-head" @click="editCropper()">
      <slot></slot>
    </div>
    <el-dialog  v-dialogDrag
                :close-on-click-modal="false"
                :title="title"
                :visible.sync="open"
                width="1000px'"
                append-to-body
                @opened="modalOpened">
      <el-row>
        <el-col :xs="24" :md="12" :style="{height: '350px'}">
          <vue-cropper
            ref="cropper"
            :img="options.img"
            :info="true"
            :autoCrop="options.autoCrop"
            :autoCropWidth="options.autoCropWidth"
            :autoCropHeight="options.autoCropHeight"
            :fixedBox="options.fixedBox"
            @realTime="realTime"
            v-if="visible"
          />
        </el-col>
        <el-col :xs="24" :md="12" :style="{height: '350px'}">
          <div :class="options.finalStyle" :style="{'width':options.autoCropWidth+'px','height':options.autoCropHeight+'px'}" >
            <img :src="previews.url" :style="previews.img" />
          </div>
        </el-col>
      </el-row>
      <br />
      <el-row>
        <el-col :lg="2" :md="2">
          <el-upload action="#" :http-request="requestUpload" :show-file-list="false" :before-upload="beforeUpload">
            <el-button size="small">
              选择
              <i class="el-icon-upload el-icon--right"></i>
            </el-button>
          </el-upload>
        </el-col>
        <el-col :lg="{span: 1, offset: 2}" :md="2">
          <el-button icon="el-icon-plus" size="small" @click="changeScale(1)"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button icon="el-icon-minus" size="small" @click="changeScale(-1)"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button icon="el-icon-refresh-left" size="small" @click="rotateLeft()"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button icon="el-icon-refresh-right" size="small" @click="rotateRight()"></el-button>
        </el-col>
        <el-col :lg="{span: 2, offset: 6}" :md="2">
          <el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
        </el-col>
      </el-row> <br />
      <el-row>

        <el-form ref="form" :model="options" :inline="true" label-width="80px">
          <el-form-item label="宽" >
            <el-input v-model="options.autoCropWidth" placeholder="宽" />
          </el-form-item>
          <el-form-item label="高">
            <el-input v-model="options.autoCropHeight" placeholder="高" />
          </el-form-item>
          <el-form-item label="切割样式" label-width="100px" >
            <el-select v-model="options.finalStyle"
                       @change="(item) => {
                          options.autoCropWidth = finalStyles[item].width;
                          options.autoCropHeight = finalStyles[item].height;
                        }"
                       placeholder="切割样式" clearable size="small">
              <el-option v-for="(value,key) in finalStyles"
                         :key="key" :label="value.name" :value="key"/>
              </el-select>
          </el-form-item>
        </el-form>
      </el-row>
    </el-dialog>
  </div>
</template>

<script>
import store from "@/store";
import { VueCropper } from "vue-cropper";
import { uploadFileOss } from '@/api/file/oss'

export default {
  components: { VueCropper },
  props: {
    dialogTitle: {
      type: String,
      default:'上传图片 常用比例 320-180 220-120'
    },
    autoCrop:{
      type: Boolean,
      default:true
    },
    fixedBox:{
      type: Boolean,
      default:true
    },
    img:{
      type: String,
      default:''
    }
  },
  data() {
    return {
      //剪切样式
      finalStyles:{
        'square-upload-preview1':{name:'矩形 320*180',width: 320,height:180},
        'square-upload-preview2':{name:'矩形 200*200',width: 200,height:200},
        'square-upload-preview3':{name:'矩形 220*120',width: 220,height:120},
        'square-upload-preview4':{name:'矩形 100*100',width: 100,height:100},
        'circle-upload-preview':{name:'圆形',width: 200,height:200}
      },
      // 是否显示弹出层
      open: false,
      // 是否显示cropper
      visible: false,
      // 弹出层标题
      title: this.dialogTitle,
      options: {
        finalStyle:'square-upload-preview3',//剪切成最终的样式
        img: this.img, //裁剪图片的地址
        autoCrop: this.autoCrop, // 是否默认生成截图框
        autoCropWidth: 320, // 默认生成截图框宽度
        autoCropHeight: 180, // 默认生成截图框高度
        fixedBox: this.fixedBox // 固定截图框大小 不允许改变
      },
      previews: {}
    };
  },
  methods: {
    // 编辑头像
    editCropper() {
      this.open = true;
    },
    // 打开弹出层结束时的回调
    modalOpened() {
      this.visible = true;
    },
    // 覆盖默认的上传行为
    requestUpload() {
    },
    // 向左旋转
    rotateLeft() {
      this.$refs.cropper.rotateLeft();
    },
    // 向右旋转
    rotateRight() {
      this.$refs.cropper.rotateRight();
    },
    // 图片缩放
    changeScale(num) {
      num = num || 1;
      this.$refs.cropper.changeScale(num);
    },
    // 上传预处理
    beforeUpload(file) {
      if (file.type.indexOf("image/") == -1) {
        this.msgError("文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。");
      } else {
        const reader = new FileReader();
        reader.readAsDataURL(file);
        reader.onload = () => {
          this.options.img = reader.result;
        };
      }
    },
    // 上传图片
    uploadImg() {
      this.$refs.cropper.getCropBlob(data => {
        //构建文件图片长传表单
        let formData = new FormData();
        formData.append("file", data);
        //提交上传请求
        uploadFileOss(formData).then(response => {
          this.open = false;
          this.options.img =response.data.location;
          this.$emit('uploadCallback',this.options.img)
          this.visible = false;
        });
      });
    },
    // 实时预览
    realTime(data) {
      this.previews = data;
    }
  }
}
</script>

<style scoped>
::v-deep .el-dialog{
  display: flex;
  flex-direction: column;
  margin:0 !important;
  position:absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
  max-height:calc(100% - 30px);
  max-width:calc(100% - 30px);
}
::v-deep  .el-dialog .el-dialog__body{
  flex:1;
  overflow: auto;
}
/*圆形最终剪切图片背景*/
.circle-upload-preview {
  position: absolute;
  top: 10%;
  right: 10%;
 /* transform: translate(50%, -50%);*/
  /*width: 200px;
  height: 200px;*/
  border-radius: 50%;
  box-shadow: 0 0 4px #ccc;
  overflow: hidden;
}

/*矩形最终剪切图片背景*/
.square-upload-preview1,.square-upload-preview2,.square-upload-preview3,.square-upload-preview4  {
    position: absolute;
    top: 10%;
    right: 5%;
   /* transform: translate(50%, -50%);*/
  /*  width: 200px;
    height: 200px;*/
    box-shadow: 0 0 4px #ccc;
    overflow: hidden;
}


</style>
